Slime-concentrating table.



No. 798,842. PATENTED SEPT. 5, 1905. A. TETRAULT & E. G. POHLE. SLIMB CONGENTRATING TABLE.

APPLICATION FILED JULY 26,1904.

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No. 798,842. PATENTED SEPT. 5. 1905. A. TETRAULT & E. 0. POHLFI.

SLIMB GONGBNTRATING TABLE.

APPLICATION FILED JULY 26, 1904.

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4W, 0 gm UNITED STATES PATENT OFFICE.

SLlME-CONCENTRATING TABLE.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed July 26,1904. Serial No. 218,292.

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Be it known that we, ALEXIS TETRAUL'I and EDWIN O. PonLi'i, citizens of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful improvements in Slime- Oonccntrating Tables; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in concentrating-tables. Itisespecially designed in its construction for use in concentrating slimes or fine pulp, and in the claims appended hereto we will specifically set out the parts and combinations of parts which constitute our invention.

Referring to the drawings, Figure 1 is a plan view of the foundation of the table. Fig 2 is a plan view of the table. Fig. 3 is a central transverse section on the line A B of Fig. 2 looking from the discharge edge of the table. Fig. at is a section of the table broken away and taken on the line C D of Fig. 2 looking toward its end. Fig. 5 is an elevation of the mechanism for oscillating the table. Fig. 6 is a detailshowing the means for independently raising or lowering the ends of the vertically-adjustable parallel beams or sills supporting the deck of the table. Fig. 7 is a vertical longitudinal section of the same.

The timbers 1 2 3 4 of the foundation-frame are preferably joined to form a rhombus and are suitably bolted and braced. A foundation brace-beam 5 extends across its hollow from timber 2 to timber 4: and at right angles to each. (See Fig. 1.) Outside of the tim her 2 is a subfoundation-frame consisting of the timbers 6, 7, and 8, the timbers 6 and T of which stand out at right angles to the timber 2. These timbers 6 and 7 of the subfoundation are braced to the main founda tion by means of the bolt-rods 9 and 10, which penetrate the end beam 8 of the subfoundation, extend through the main frame, and are bolted on the outer side of its timber 4:. Upon the main foundation parallel beams or sills 11 and 12 rest parallel and near to the timbers 2 and a and are confined within slots or ways 13, formed by the bracket-castings it on the timbers 1 and 3. These beams or sills are vertically adjustable at their ends, which are under the receiving edge of the deck of the table, by'means of cams 15, which are fixed to and carried upon an underlying shaft 16 parallel to the timber 1 and journaled at its ends upon the timbers 2 and L. At one end of the shaft is a lever-arm 17 to rock the shaft and its cams. This leverarm is secured at any desired position on the turning of the shaft by means of a thumbscrew 18, which fastens it to a semicircular slotted frame 19. These cams 15 are adjustable on the shaft by means of set-screws 20, and in the turning of the shaft they act in unison to elevate the beams or sills 11 and 12. On top of these beams 11 and 12 are journal-bearings 21, in which are journalcd upwardly-extending wedge-shaped rocker-arms 22 to support the deck of the table, as presently explained. These -rocker-arms are positioned upon the beams so as to swing transverse to the line of the beams and are at the same distance apart on the beams. Upon the upper point of these wedge-shaped rockerarms the deck 23 of the table rests. The points of the rockerarms enter downwardly-opening bearings 2d on the under side of the deck, which are V- shaped in cross-section.

Rising from the brace-beam 5 is a bumperblock 25. which, as hereinafter explained, meets or bumps against a bumper-block 26, depending from the deck, during the oscillations of the deck on its rocker-arms. The deck of the table is preferably oblong in shape, with its head end truncated upon an angle equal to the angle of the underlying timber of the foundation. The deck of the table is oscillated from its truncated head end and moves diagonally on its supporting rockerarms across the foundation-frame.

The receiving edge 27 of the table is preferably raised above the discharge edge 28 by means of the cams 15, and its end 29 is preferably a little higher-"say half an inch than the head end of the table. The end is raised by raising the beam 12, which supports it. This beam, as explained before, is raised at the receiving edge or side of the table by means of the underlying cam 15; but at its other end it is raised by means of a supporting-plate 30, loosely hinged in an end bottom recess 31 in the beam by the screw or bolt 32 and pressed out of said recess, so as to lift the beam by the screw-bolt 33, (see Figs. 6 and 7,) so that this end of each beam is independently adjusted to raise or lower either corner of the table at its discharge side.

Above and along the receiving side edge of the deck is a hopper or feed box 34:, which is divided into two compartments 35 and 36.

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The compartment 36 is located near or at the head end of the box and discharges the slimes through its bottom holes down upon the deck at its upper head-end corner. The compartment 36 discharges its contents of clear water down upon the deck farther along its receiving side edge.

The deck of the table is oscillated on its rocker-arms by means of a pitman-rod 37, which is coupled at its outer end upon a crankshaft 38, having bearings on the yokes 39 of the standard L0 on the subfoundation-timbers 6 7 8, which stand out at right angles to the timber 2 of the main foundation-frame, at the corner thereof underlying the upper receiving-corner of the superposed deck. The shaft 38 is provided at one end with a fly-wheel 4:1 and its other end with fast and loose pulleys 4:2 43. At the free end of the pitman-rod is a bow-spring 44, connected to it by saddleblocks 45. From the free ends of the bowspring links 46 stand inward and are connected to a head 47 on the end of a threaded rod 48, which penetrates the outer side of a loopbracket 49, secured to and extending from the head-end edge of the receiving-corner of the deck. This threaded rod 48 is provided within the loop and without the loop with nuts 50, so that by the turning of said nuts the rod may be adjusted in and out of the loop, and thereby adjust the deck to and from its driving crank-shaft 38. The deck of the table is perfectly smooth, and the slimes being-fed from its hopper-box 34 at the upper head corner of the deck are propelled across the deck on the line of the motion thereof and diagonal to their natural flow and the flow of the wash-water from the compartment 36. A spray-pipe 51 extends along both the discharge edge and end of the table to prevent any clogging of the material. The branch of the spray-pipe 51 which extends along the edge of the end of the table is of very little use, as little or none of the material ever reaches that edge.

The slimes are fed into the compartment 35 of the feed-box and flow out therefrom through bottom holes onto the upper head-end corner of the deck and gravitate sidewise of the deck on a slightly diagonal line toward the lowerend corner of the discharge edge. The clear wash-water is distributed from the compartment 36 of the feed-box and naturally gravitates over the deck in the same direction as the slimes. As soon as the slimes reach the deck they come under the influence of its motion, which tends to throw the valuable portions thereof in the direction of the motion of the oscillation of the deck and through the wash-water. The approximate direction of the slimes is illustrated by the arrows a, and the approximate direction of the wash-water is illustrated by the arrows b, Fig. 2.

Much of the value of slimes will float when exposed to the air, and so it is desirable at all times to keep the values submerged lest they float upon the surface of the wash water. This we accomplish by the movement of the deck of the table. This deck, resting upon its rocker-arms, is oscillated from end to end diagonally through the arc described by its rocker-arms. In its forward movement it rises in said are and then after passing the vertical is lowered. Just after its rocker arms'pass a vertical and during thelowering of the deck the bumper-block 26, depending from the deck, bumps against a bumper-block 25 on the foundation-timbers and is abruptly stopped. In the rise of the deck in its forward movement the values in the pulp in the water attain momentum, and when the rockermomentum through the wash-water in the direction of the travel of the deck. Their momentum may be such as to drive them to the surface of the water, in which case they would float on the water and lose their momentum; but before they have'a chance to 'float the deck is lowered on its rocker-arms, andv when it is abruptly stopped by the bump whatever slimes there be will be dropped or caused to sink in the direction of the travel of the table. Thus the most of the slimes will be kept submerged and will travel in the direction of the oscillation of the table by reason of their momentum from the bumper-blocks, and those slimes which reach the surface of the water will be instantly submerged and prevented from floating on the surface.

1. In a slime-concentrating table, a foundation of rhombus form, vertically-adjustable beams thereon at either end thereof parallel to each other and to the ends of the frame, a longitudinal rocking shaft at one side of said frame, means for locking said shaft in its turning, adjustable cams on said shaft underlying said beams and adapted to raiseor lower the same, longitudinally-hinged bearing-plates in the other ends of said beams, means for projecting said bearing-plates from the beams whereby to raise the same, upwardly-projecting rocker-arms journaled on said adjustable of the beams, a deck resting on said rockerarms and means for oscillating said deck thereon, a bumper-block depending from said deck and a bumper-block rising from said frame described.

2. In a concentrating-table, a foundationframe, and means thereon for supporting said table in operative relation to said frame consisting of a bracket-guide rising from each corner of said frame, a pair of beams each loosely fitted in a pair of said guides, means arranged beneath the beams at one side of said frame for simultaneously and vertically adjusting the ends of said beams, means carried by'the other ends of said beams for independa'rms pass avertical these values rise by their beams and swinging at right angles to the line in the same vertical plane, substantially asently adjusting each vertically, a pair of rocker-arms mounted upon the upper side of each beam, and adapted to swing at right angles to the length of said beams, in combination with a table mounted on said rockerarms, an abutment carried by said table, an abutment carried by said frame, means for reciprocating said table, means for adjusting the table toward and from its driving crankshaft to vary its stroke consisting of the crankshaft, the pitman-rod the bow-spring, the links connecting said spring, the head connecting said links and having a screw-stem, a loop-bracket secured to and projecting from said table, and nuts engaging said screw-stem and said bracket.

In a concentrating-table and in combination, a foundation-frame, a pair of beams and means for loosely mounting each beam along and parallel with the opposite sides of said frame, means for simultaneously adjusting the ends of said beams vertically at one side of said frame consisting of a rock-shaft mounted on said frame beneath said beams and having cams each engaging the end of a beam, a lever for rocking said rock-shaft and a clamp for securing said lever, means for independently adjusting the end of each beam at the other side of said frame consisting of a plate loosely hinged at the end of said beam and a bolt in said beam engaging the free end of said plate to force it outward upon said frame with a lifting action upon the beam.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ALEXIS TlEilRAU Ll. EDWIN U. POHLIG.

Witnesses:

W'. S. OVERMAN, J. M. LAWRENCE. 

